package com.lishilin.gulimall.ware.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * 使用mybatis的分页插件
 */
@Configuration
@EnableTransactionManagement//开启事务  我们的方法标了事务注解就可以使用事务了
@MapperScan("com.lishilin.gulimall.ware.dao")
public class MyBatisConfig {
  //引入分页插件
  // 旧版
  @Bean
  public PaginationInterceptor paginationInterceptor() {
      PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
      // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
       paginationInterceptor.setOverflow(true);
      // 设置最大单页限制数量，默认 500 条，-1 不受限制
       paginationInterceptor.setLimit(1000);
      // 开启 count 的 join 优化,只针对部分 left join
      paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
      return paginationInterceptor;
  }
}
